Date: Fri, 07 Aug 2009 18:27:00 +0800 From: "C. C. Tang" <hiyorin@gmail.com> To: Robert Noland <rnoland@FreeBSD.org> Cc: freebsd-acpi@freebsd.org Subject: Re: acpi_task_0 consuming cpu resource Message-ID: <4A7C0174.7060400@gmail.com> In-Reply-To: <1249638688.1773.167.camel@balrog.2hip.net> References: <4A7B949B.7010003@gmail.com> <1249615962.1773.150.camel@balrog.2hip.net> <4A7BA95F.6090405@gmail.com> <1249638688.1773.167.camel@balrog.2hip.net>
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> Not sure then... I've got that board swapped out for a VIA board right
> now. It tends to be noisy enough in my office with all the other fans
> running that I really can't hear that one. I did have the smart fan
> control enabled on both the case fan and cpu fan. It also periodically
> rebuilds lots of ports or kernels with -j 5, so if it was going to heat
> up, that should do it... If I can dig up a spare case and power, I'll
> hook it back up and see if I can break it. Otherwise it will have to
> wait until I get done with the VIA driver... I haven't really had any
> issues that I can think of with that board, other than it is a bit slow
> for compiling. It runs amd64 just fine.
Really thanks for your reply.
I will keeping watching it to see what situation in which the problem
will happen.
I am running on i386 version and I think the compile speed is OK for me.
Anyway it is not a very fast CPU :)
> Just remembering an issue that I had with some old p4 boxes though. On
> those boxes, when they got hot, they would trigger an acpi message that
> was picked up by devd. There was no way to throttle the messages, so it
> would work the cpu as hard as it could, processing the messages. The
> only solution at that point was to power it off for a few minutes while
> it cooled off and not work it too hard. That sounds like what you are
> seeing. Are you seeing messages in syslog?
I have just done a
# stress --cpu 1 --io 1 --vm 1 -d 1
for several hours on the machine.
Although it is not quite stressful, I think it is enough for it to reach
100% load.
But I didn't notice any such warning in the system log and the
acpi_task_0 problem didn't appear...
By the way I cannot read any temperature from acpi or smbus except
coretemp. (may be I loaded wrong driver?)
So I am not sure how hot did the system got.
Thanks,
C.C.
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